Or 1000 minimum, if i remember correctly in Halo first season you also couldnt make enough coins for next season and they fixed it.
Every F2P game with bp i played, made you enough currency for each battle pass.
Current system is basically scam, its not about the money, its about the principle…
There is already standartized system for battle passes and blizzard have such a balls to copy it and make even more greedy…
Why when they can charge you for both
I believe that sooner or later they will use their currency to incentivize the Flex Queue for better player retention.
I’d rather have legacy coins tbh. The battlepass grind is more forgiving than I thought, and if you can get enough coins to buy the battlepass they’re going to make the BP content even lamer and hike up the prices of everything else.
I’d be open to the 1000 being earnable, not more though (Blizz need to make money)… 
I’d have 500 in the pass and 500 in challenges.
I’d also add that to earn the full 1000 credits (free battlepass) would be a huge grind (take most of season to do) with 100-300 more reasonable with casual play.
I think that’s fair both to the players and to Blizz…
They didn’t include any first season period.
Dunno if I’d use the word “fix” as they were never meant to be included in the first place.